gps service - repair

Good morning

Ladies and gentlemen, as previously reported (letter of 5/09/2017) I have huge problems with the GPS Aventura device purchase: 2012.

... on my device I noticed "wiping" the green elements of the case. During use, these parts began to rub, stretch to break and crumble. In this state of GPS I have secured the insulation tape, but it looks very bad. Such a repair works every few days. This is a problem for me and it is very tedious. I would like to fix it.
I have already received a reply from Twonaw on this matter, but I was not determined. Currently GPS status has deteriorated. A stain appeared on the display, which indicates "burning out pixels or other display wear. I think he is for exchange.
I would like to report a GPS repair now.
This applies to display replacement and green housing parts.
The green parts placed at the top and bottom of the GPS are in good technical condition (but this is only my rating), no "USB input end cap".

I am asking you to confirm the estimated costs of replacing the used GPS parts.
If the device can be repaired, please specify the conditions for accepting the repair order:

In what technical condition is the shipment required (memory card, maps, battery, etc., or only the housing.?
What documents should be attached to the repair order?
How should the device be packed?
Is it necessary to insure the parcel ,?
what are the terms of payment: partial prepayment (advance payment, 100% gross transfer, payment in 2 installments before and after the repair, other.?
What is the deadline for completing the order?
What will the warranty be after repair and where it can possibly be implemented?
 
I am happy to read all the comments

Jerzy Choromanski
(Ps, sorry for the quality of the translation of the text)